Merge pull request #2189 from REJack/v3-dev

fixed placehold.it link

pages/UI/general.html

@@ -1298,13 +1298,13 @@
                   </ol>
                   <div class="carousel-inner">
                     <div class="carousel-item active">
-                      <img class="d-block w-100" src="http://placehold.it/900x500/39CCCC/ffffff&text=I+Love+Bootstrap" alt="First slide">
+                      <img class="d-block w-100" src="https://placehold.it/900x500/39CCCC/ffffff&text=I+Love+Bootstrap" alt="First slide">
                     </div>
                     <div class="carousel-item">
-                      <img class="d-block w-100" src="http://placehold.it/900x500/3c8dbc/ffffff&text=I+Love+Bootstrap" alt="Second slide">
+                      <img class="d-block w-100" src="https://placehold.it/900x500/3c8dbc/ffffff&text=I+Love+Bootstrap" alt="Second slide">
                     </div>
                     <div class="carousel-item">
-                      <img class="d-block w-100" src="http://placehold.it/900x500/f39c12/ffffff&text=I+Love+Bootstrap" alt="Third slide">
+                      <img class="d-block w-100" src="https://placehold.it/900x500/f39c12/ffffff&text=I+Love+Bootstrap" alt="Third slide">
                     </div>
                   </div>
                   <a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev">